FWIW, I’m a happy FW13 (AMD-Ryzen 7-7840U) owner, running CachyOS znver4. The only gripe I have is the 6GHz issue. But I have the same issue on my desktop, also AMD (Ryzen 9-5900XT) running CachyOS x64_86-v3.
Teh interwebs are full of complaints about the MediaTech wifi units present in both my AMD boxes. I think it’s more a MediaTech thing, rather than a Framework or Cachy one.
FWIW, Intel wifi 6e and 7 MLO work just fine on my Intel boxes with Intel wifi.